The fates of aromatic protein and soluble microbial product-like organics, as the precursors of dichloroacetonitrile and dichloroacetamide, in drinking water advanced treatment processes

2019 ◽  
Vol 5 (8) ◽  
pp. 1478-1488
Author(s):  
Tao Lin ◽  
Han Chen ◽  
Shaoxin Ding ◽  
Wei Chen ◽  
Hang Xu
Keyword(s):  
Drinking Water ◽  
Advanced Treatment ◽  
Microbial Product ◽  
Treatment Processes ◽  
Soluble Microbial Product ◽  
By Products

Dichloroacetonitrile (DCAN) and dichloroacetamide (DCAcAm) are two typical nitrogenous disinfection by-products (N-DBPs) with strong cytotoxicity and genotoxicity.

The formation and control of ozonation by-products during drinking water advanced treatment in a pilot-scale study

2021 ◽  
pp. 151921
Author(s):  
Yongjing Wang ◽  
Songtao Wang ◽  
Jinglin Li ◽  
Xinyu Yan ◽  
Cheng Li ◽  
...  
Keyword(s):  
Drinking Water ◽  
Pilot Scale ◽  
Advanced Treatment ◽  
And Control ◽  
By Products

Variation of Disinfection By-Products Formation Potential Species at Several Stages of Drinking Water Treatment Plants

2013 ◽  
Vol 777 ◽  
pp. 337-340
Author(s):  
Qiang Zhang ◽  
Bin Liu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Biological Activated Carbon ◽  
Formation Potential ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
Microbial Products ◽  
Water Plants ◽  
By Products

The variation of disinfection by-products (DBPs) at several stages of drinking water treatment plants was investigated in two drinking water plants. The results clearly indicate that the low molecular weight total organic carbon (TOC) which has been identified as primary precursor for chlorinated DBPs was difficult to remove by coagulation. Plant A which used conventional coagulation/sedimentation could not decrease the species of trihalomethanes (THMs) and haloacetic acids (HAAs) formation potential. Biological activated carbon (BAC) was applied in Plant B which removed the maximum amount of TOC, while more kinds of microbial products were produced in BAC unit which could be the potential precursors of DBPs. Therefore, the species of DBPs formation potential still increased in the treatment processes of Plant B. Because different components of organic precursors produced different DBPs species, the processes of Plant B could decrease TOC efficiently but the species of THMs and HAAs formation potential.

The formation and control of emerging disinfection by-products of health concern

2009 ◽  
Vol 367 (1904) ◽  
pp. 4077-4095 ◽  
Author(s):  
Stuart W. Krasner
Keyword(s):  
Drinking Water ◽  
Chlorine Dioxide ◽  
Drinking Water Treatment ◽  
Treated Wastewater ◽  
Health Concern ◽  
Treatment Processes ◽  
Wide Range ◽  
And Control ◽  
Emerging Dbps ◽  
By Products

When drinking water treatment plants disinfect water, a wide range of disinfection by-products (DBPs) of health and regulatory concern are formed. Recent studies have identified emerging DBPs (e.g. iodinated trihalomethanes (THMs) and acids, haloacetonitriles, halonitromethanes (HNMs), haloacetaldehydes, nitrosamines) that may be more toxic than some of the regulated ones (e.g. chlorine- and bromine-containing THMs and haloacetic acids). Some of these emerging DBPs are associated with impaired drinking water supplies (e.g. impacted by treated wastewater, algae, iodide). In some cases, alternative primary or secondary disinfectants to chlorine (e.g. chloramines, chlorine dioxide, ozone, ultraviolet) that minimize the formation of some of the regulated DBPs may increase the formation of some of the emerging by-products. However, optimization of the various treatment processes and disinfection scenarios can allow plants to control to varying degrees the formation of regulated and emerging DBPs. For example, pre-disinfection with chlorine, chlorine dioxide or ozone can destroy precursors for N -nitrosodimethylamine, which is a chloramine by-product, whereas pre-oxidation with chlorine or ozone can oxidize iodide to iodate and minimize iodinated DBP formation during post-chloramination. Although pre-ozonation may increase the formation of trihaloacetaldehydes or selected HNMs during post-chlorination or chloramination, biofiltration may reduce the formation potential of these by-products.

Health risks associated with drinking water in a context of climate change in France: a review of surveillance requirements

2011 ◽  
Vol 2 (4) ◽  
pp. 230-246 ◽  
Author(s):  
Pascal Beaudeau ◽  
Mathilde Pascal ◽  
Damien Mouly ◽  
Catherine Galey ◽  
Olivier Thomas
Keyword(s):  
Climate Change ◽  
Water Management ◽  
Drinking Water ◽  
Health Risks ◽  
Quality Changes ◽  
Raw Water ◽  
Treatment Processes ◽  
Health Burden ◽  
Emerging Trends ◽  
By Products

It is widely recognized that climate change will impact upon human health in a variety of ways. Assessing these impacts and identifying adaptation opportunities requires appropriate monitoring. To identify the need for reinforced surveillance in metropolitan France, we defined a conceptual framework of how climate change could impact upon health risks in relation to drinking water. Three types of climate change-related impacts were identified: changes in raw water quality, changes in water treatment processes and changes in human determinants of exposure in relation to consumers' behaviour. This framework was applied to existing risks and exposure situations in France. An increase in the health burden attributable to drinking water intake is expected due to increased exposure to faecal pathogens, disinfection by-products and cyanobacteria as a result of a combination of natural, technical and human factors. Current sources of health and water data should satisfy surveillance requirements. However, we believe that the creation of a sustainable database comprising behavioural and water management data would be valuable in following and understanding emerging trends.

Removal of disinfection by‐products and their precursors during drinking water treatment processes

2019 ◽  
Vol 92 (5) ◽  
pp. 698-705 ◽  
Author(s):  
Qiufeng Lin ◽  
Feilong Dong ◽  
Yunxia Miao ◽  
Cong Li ◽  
Weicheng Fei
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
By Products

Advanced Treatment of Drinking Water by Ultrafiltration Membrane

2013 ◽  
Vol 647 ◽  
pp. 543-547 ◽  
Author(s):  
Yi Xin Yang ◽  
Jie Chen
Keyword(s):  
Molecular Weight ◽  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Ultrafiltration Membrane ◽  
Advanced Treatment ◽  
Treatment Processes ◽  
Large Molecular Weight ◽  
Algae And Bacteria ◽  
Ultrafiltration Process

Advanced treatment of drinking water was performed by ultrafiltration process (UF) in this study. Experimental results showed that UF is a perfect physical sieving barrier to remove turbidity, algae and bacteria from water, which is far superior to conventional water treatment processes. But the ultrafiltration membrane is not very effective for the removal of dissolved organic matter because of the large molecular weight cut-off. And the backwashing per 30min can totally renew the ultrafiltration membrane.

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